Service Manual

6802800U74-AN
Chapter 13: MTS Troubleshooting
376
Alarm ID
Descrip-
tion
Recovery
Action
Clear Ac-
tion
Notes
• ALM_AMBI-
ENT_TEMP_ALM_WARN
• ALM_AMBI-
ENT_TEMP_WARN
• ALM_AMBI-
ENT_TEMP_ALM_FAULT
• ALM_AMBI-
ENT_TEMP_FAULT
The ambi-
ent temper-
ature is
above the
ambient
temperature
threshold
for the low
output pow-
er.
The ambi-
ent temper-
ature is
greater than
the allowa-
ble high
temperature
threshold or
lower than
the allowa-
ble low tem-
perature
threshold.
No recovery
action taken
by the soft-
ware.
BRC is de-
keyed by the
software if
the ambient
temperature
is greater
than the al-
lowable high
temperature
threshold.
If the alarm
condition
disappears
then the
alarm is
cleared.
If the alarm
condition
disappears
the alarm is
cleared and
BRC can be
re-keyed
again.
ALM_TX_LO_LOCK Exciter syn-
thesizer
lock detect
failure.
BRC is de-
keyed by the
software.
If the alarm
condition
disappears
the alarm is
cleared and
BRC can be
re-keyed
again.
The alarm may
be reported be-
cause of the
BRC hardware
failure or be-
cause TX VCO
is not properly
tuned (BCD
NVM parame-
ters configura-
tion).
ALM_TX_PLL_LOCK_DE-
TECT_FAIL
Reported when ALM_TX_LO_LOCK is set and
ALM_BRC_16_8MHZ_FAIL_ALM is cleared
• ALM_TX_LO_SL
• ALM_TX_PLL_SL_FAIL
ALM_TX_TEMP_INTER-
NAL_FAIL
Exciter syn-
thesizer
steering line
failure.
Exciter tem-
perature is
too high.
BRC is de-
keyed by the
software.
BRC is de-
keyed by the
software.
If the alarm
condition
disappears
the alarm is
cleared and
BRC can be
re-keyed
again.
If the alarm
condition
disappears
The alarm may
be reported be-
cause of the
BRC hardware
failure or be-
cause TX VCO
is not properly
tuned (BCD
NVM parame-
ters configura-
tion).